Ụkpụrụ ikpo ọkụ nke ihe esi nri ntinye
A na-eji cooker induction na-ekpo ọkụ nri dabere na ụkpụrụ nke induction electromagnetic. N'elu ọkụ nke osi ite induction bụ efere seramiiki na-eguzogide okpomọkụ. Igwe mmiri na-agbanwe agbanwe na-ebute oghere ndọta site na eriri igwe dị n'okpuru efere seramiiki. Mgbe eriri magnetik dị na oghere magnet na-agafe na ala nke ite ígwè, ite igwe anaghị agba nchara, wdg, a ga-eme ka mmiri ọkụ na-eme ka ọ dị ọkụ, nke ga-eme ngwa ngwa kpoo ala nke ite ahụ, iji nweta nzube nke ikpo ọkụ nri.
Usoro ọrụ ya bụ nke a: A na-atụgharị voltaji AC ka ọ bụrụ DC site na onye na-emegharị ihe, mgbe ahụ, a na-agbanwe ike DC n'ime ike AC dị elu nke karịrị ụda olu site na ngwaọrụ ntụgharị ike dị elu. A na-agbakwunye ike AC ugboro ugboro na eriri igwe kpo oku dị larịị oghere oghere iji mepụta oghere ndọta na-agbanwe ugboro ugboro. Ahịrị ndọta nke ike na-abanye n'ime efere seramiiki nke stovu ahụ wee mee ihe n'ite ọla ahụ. A na-ebute ọwa mmiri siri ike n'ime ite esi nri n'ihi ntinye ọkụ eletrik. Eddy ugbu a na-emeri nguzogide dị n'ime ite ahụ iji mechaa ngbanwe nke ike eletrik na ike ọkụ mgbe ọ na-asọpụta, na okpomọkụ Joule na-emepụta bụ isi iyi ọkụ maka isi nri.
Ntụle sekit nke ụkpụrụ ịrụ ọrụ ihe esi nri induction
1. Isi sekit
N'ọnụọgụ a, akwa mgbagharị BI na-agbanwe voltaji ugboro ugboro (50HZ) ka ọ bụrụ voltaji DC na-atụgharị. L1 bụ nkpagbu na L2 bụ eriri igwe electromagnetic. A na-ebugharị IGBT site na usu akụkụ anọ site na sekit njikwa. Mgbe agbanyere IGBT, ihe dị ugbu a na-agafe na L2 na-abawanye ngwa ngwa. Mgbe ebipụrụ IGBT, L2 na C21 ga-enwe usoro resonance, na C-pole nke IGBT ga-emepụta ụda voltaji dị elu na ala. Mgbe usu na-adaba na efu, a na-agbakwunye usu mbanye na IGBT ọzọ iji mee ka ọ na-eduzi. Usoro a dị n'elu na-aga gburugburu na gburugburu, a na-emepụtakwa ikuku electromagnetic nke dị ihe dị ka 25KHZ n'ikpeazụ, nke na-eme ka ite ígwè dị ala tinye na efere seramiiki na-eme ka ọ dị ọkụ ma mee ka ite ahụ dị ọkụ. Ugboro nke usoro resonance na-ewe parampat nke L2 na C21. C5 bụ ike nzacha capacitor. CNR1 bụ varistor (onye na-anabata ihe). Mgbe voltaji ọkụ ọkụ AC na-ebili na mberede n'ihi ihe ụfọdụ, ọ ga-adị mkpụmkpụ circuited ozugbo, nke ga-agba ọsọ ngwa ngwa fuse iji chebe sekit.
2. ike inyeaka
Igwe ọkụ na-agbanwe agbanwe na-enye sekit na-eme ka voltaji kwụsie ike: + 5V na + 18V. The + 18V mgbe akwa rectification na-eji maka mbanye sekit nke IGBT, na IC LM339 na fan mbanye sekit tụnyere synchronously, na + 5V mgbe voltaji stabilization site atọ ọnụ voltaji stabilizing sekit na-eji maka isi akara MCU.
3. Onye ofufe jụrụ oyi
Mgbe agbanyere ike ahụ, isi njikwa IC na-ezipụ akara ngosi fan drive (FAN) iji mee ka fan ahụ na-agbagharị, kunye ikuku oyi dị n'èzí n'ime ahụ igwe, wee wepụ ikuku na-ekpo ọkụ n'akụkụ azụ nke igwe ahụ. iji nweta ebumnuche nke ikpochapu ọkụ na igwe, iji zere mmebi na ọdịda nke akụkụ n'ihi oke okpomọkụ na-arụ ọrụ na gburugburu ebe obibi. Mgbe fan ahụ kwụsịrị ma ọ bụ ikpo ọkụ adịghị mma, a na-etinye mita IGBT na thermistor ka ọ bufee mgbama oke ọkụ na CPU, kwụsị ikpo ọkụ, wee nweta nchebe. N'oge a na-agbanye ọkụ, CPU ga-ezipụ ihe mgbaàmà nchọpụta fan, mgbe ahụ, CPU ga-ezipụ akara ngosi ihe ngosi iji mee ka igwe na-arụ ọrụ mgbe igwe na-arụ ọrụ nke ọma.
4. njikwa okpomọkụ mgbe niile na sekit nchebe oke ọkụ
Isi ọrụ nke sekit a bụ ịgbanwe a okpomọkụ na-agbanwe voltaji unit nke ndị na-eguzogide dị ka okpomọkụ chere site thermistor (RT1) n'okpuru seramiiki efere na thermistor (na-adịghị mma okpomọkụ ọnụọgụ) na IGBT, na-ebufe ya na isi. njikwa IC (CPU). CPU na-eme mgbama na-agba ọsọ ma ọ bụ nkwụsị site n'ịtụle uru ọnọdụ okpomọkụ setịpụrụ mgbe ntụgharị A/D gasịrị.
5. Isi ọrụ nke isi njikwa IC (CPU)
Isi ọrụ nke 18 pin master IC bụ ndị a:
(1) Mgbanwe ọkụ ọkụ / gbanyụọ njikwa
(2) Ike ikpo ọkụ / njikwa okpomọkụ mgbe niile
(3) Njikwa ọrụ akpaka dị iche iche
(4) Enweghị nchọpụta ibu na nkwụsị akpaka
(5) Nchọpụta ntinye ọrụ igodo
(6) Nchekwa elu okpomọkụ dị elu n'ime igwe
(7) Nyocha ite
(8) ọkwa ikpo ọkụ elu ọkụ
(9) njikwa fan jụrụ oyi
(10) Njikwa ihe ngosi panel dị iche iche
6. Ibu ibu sekit nchọpụta ugbu a
Na sekit a, a na-ejikọta T2 (transformer) n'usoro na akara dị n'ihu DB (bridge rectifier), ya mere voltaji AC na T2 nke abụọ n'akụkụ nwere ike igosi mgbanwe nke ntinye ugbu a. A na-agbanwe voltaji AC a ka ọ bụrụ voltaji DC site na D13, D14, D15 na D5 ndozigharị zuru oke, a na-eziga voltaji ozugbo na CPU maka ntụgharị AD mgbe nkewa voltaji gasịrị. CPU na-ekpebi nha dị ugbu a dị ka uru AD tụgharịrị si dị, gbakọọ ike site na sọftụwia wee jikwaa nha mmepụta PWM iji jikwaa ike wee chọpụta ibu ahụ.
7. sekit ụgbọala
Sekit ahụ na-eme ka mmepụta mgbama pulse si na sekit ngbanwe obosara pulse gaa na ike mgbaama zuru ezu iji mee ka IGBT mepee ma mechie. Ka obosara ntinye ntinye aka, na-adị ogologo oge mmeghe IGBT. Ka ike mmepụta nke igwe igwe na-esiwanye ike, ka ọkụ na-adị elu.
8. Ntugharị oscillation na-emekọrịta ihe
sekit oscillating (sawtooth wave generator) nke mebere loop nchọpụta synchronous nke mejupụtara R27, R18, R4, R11, R9, R12, R13, C10, C7, C11 na LM339, nke ugboro ole oscillating na-emekọrịta na ugboro ọrụ nke osi nri n'okpuru. Mgbanwe PWM, na-ewepụta usu na-emekọrịta ihe site na pin 14 nke 339 ịkwọ ụgbọala maka ịrụ ọrụ kwụsiri ike.
9. sekit nchebe anya
Sekit nchebe nke ukwuu mejupụtara R1, R6, R14, R10, C29, C25 na C17. Mgbe ịwa ahụ dị elu, pin 339 2 na-emepụta ọkwa dị ala, n'otu aka ahụ, ọ na-agwa MUC ka ọ kwụsị ike, n'aka nke ọzọ, ọ na-agbanyụ akara K site na D10 iji gbanyụọ mmepụta ike ụgbọala.
10. Mgbasa ozi nke ịchọpụta voltaji
A na-eji sekit nchọpụta voltaji mejupụtara D1, D2, R2, R7, na DB iji chọpụta ma voltaji ọkọnọ ike dị n'ime oke 150V ~ 270V mgbe CPU tụgharịrị ozugbo pulse wave AD.
11. Instantaneous elu voltaji akara
Ihe mejupụtara R12, R13, R19 na LM339. Mgbe voltaji azụ bụ ihe nkịtị, sekit a agaghị arụ ọrụ. Mgbe voltaji dị elu ozugbo gafere 1100V, pin 339 1 ga-ewepụta ikike dị ala, wetuo PWM, belata ike mmepụta, jikwaa voltaji azụ, chebe IGBT, ma gbochie ndakpọ oke ọkụ.
Oge nzipu: Ọktoba 20-2022
